A practical reference on GW501516: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-03-20 and is reviewed periodically as new material appears.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
Cardarine is a common name for GW501516, a synthetic compound first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
| Property | Value | Notes |
|---|---|---|
| Molecular target | PPAR delta (NR1C2) | Ligand-activated nuclear receptor. |
| Primary tissues studied | Skeletal muscle, liver, adipose | Effects on fatty acid oxidation and energy use. |
| Typical detection matrix | Urine | Used in anti-doping analysis. |
| Common analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Sport regulatory class | Prohibited at all times | Listed as a metabolic modulator by WADA. |
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
== Role as a national certifying agency == The American Board of Bioanalysis, is a national certifying agency in the United States of America, for clinical laboratory directors and supervisors. The AAB Board of Registry is a national certifying agency in the United States of America for medical technologist and medical laboratory technicians. Those certified either meet or exceed the minimum requirements for testing personnel under Clinical Laboratory Improvement Amendments.
== See also == List of investigational drugs List of investigational generalized anxiety disorder drugs List of investigational social anxiety disorder drugs List of investigational post-traumatic stress disorder drugs List of investigational anxiety disorder drugs
Selegiline was approved for Parkinson's disease by the FDA in 1989. It had been known since the mid-1960s that high doses of deprenyl had psychostimulant effects. Selegiline was first shown to metabolize into levomethamphetamine and levoamphetamine in humans in 1978. The involvement of these metabolites in the effects and side effects of selegiline has remained controversial and unresolved in the decades afterwards. In any case, concerns about these metabolites have contributed to the development of newer MAO-B inhibitors like rasagiline and safinamide that lack such metabolites. The catecholaminergic activity enhancer (CAE) effects of selegiline became well-characterized and distinctly named in 1994. These effects had been observed much earlier, dating back to the 1960s and 1970s, but were not properly distinguished from the other actions of selegiline, like MAO-B inhibition, until the 1990s. More potent, selective, and/or expansive monoaminergic activity enhancers (MAEs), like phenylpropylaminopentane (PPAP) and benzofuranylpropylaminopentane (BPAP), were derived from selegiline and other compounds and were first described in 1988 and 1999, respectively. These drugs had been proposed for potential treatment of psychiatric disorders like depression as well as for Parkinson's disease and Alzheimer's disease, but were never developed or marketed. In the 1990s, J.
3 April – NASA selects three companies – Intuitive Machines, Lunar Outpost and Venturi Astrolab – to develop its Lunar Terrain Vehicle, for use in crewed Artemis missions from 2030 onwards. 4 April A study in Nature finds that global CO2 emissions increased by only 0.1% in 2023, suggesting that a plateau may have been reached. The Dark Energy Spectroscopic Instrument (DESI) project releases multiple papers which report unprecedented measurements of dark energy, find indications that dark energy which is expanding the Universe is evolving over time, and release the most detailed largest 3D cosmic map to date. 5 April – A numerical toolkit designed for modelling warp drive spacetimes is introduced in Classical and Quantum Gravity. 9 April – A rare genetic variation in a gene that makes fibronectin is shown to reduce the odds of developing Alzheimer's disease by over 70%. 11 April – The first nitrogen-fixing organelle in a marine alga is reported, the nitroplast. The early evolutionary stage organelle provides a view into the transition from an endosymbiont into a proper organelle that receives about half of its proteins from the alga. 12 April Biologists report that bonobos behave more aggressively than thought earlier. Scientists describe how tardigrades are protecting themselves from large radiation exposure and damage, which is quickly repaired, using the Dsup protein. 15 April The NOAA confirms a fourth global coral bleaching event. The world's first commercial-scale factory producing sustainable high-protein food from air, microbes and solar energy, Solein, launches.
The two components of the proton-motive force are thermodynamically equivalent: In mitochondria, the largest part of energy is provided by the potential; in alkaliphile bacteria the electrical energy even has to compensate for a counteracting inverse pH difference. Inversely, chloroplasts operate mainly on ΔpH. However, they also require a small membrane potential for the kinetics of ATP synthesis. In the case of the fusobacterium Propionigenium modestum it drives the counter-rotation of subunits a and c of the FO motor of ATP synthase. The amount of energy released by oxidative phosphorylation is high, compared with the amount produced by fermentation. Glycolysis produces only 2 ATP molecules, but somewhere between 30 and 36 ATPs are produced by the oxidative phosphorylation of the 10 NADH and 2 succinate molecules made by converting one molecule of glucose to carbon dioxide and water, while each cycle of beta oxidation of a fatty acid yields about 14 ATPs. These ATP yields are theoretical maximum values; in practice, some protons leak across the membrane, lowering the yield of ATP.
Sources: en.wikipedia.org
Later in the eighteenth century the crown sought to decrease the privileges (fueros) of the clergy, restricting clerical authority to spiritual matters and undermining the power of parish priests, who often acted as agents of the crown in rural parishes. By desacralizing power and frontal attacks on the clergy, the crown, according to William B. Taylor, undermined its own legitimacy, since parish priests had been traditionally the "natural local representatives of their Catholic king." In the economic sphere, the crown sought to gain control over church revenues. The Church functioned as one of the largest economic institutions within colonial Spanish America. It owned and retained jurisdiction over large amounts of land, which the crown wanted for itself because of the economic value which could be derived from the land. Moreover, by taking that land for itself, the Crown had the opportunity to cut down the physical presence of the Church to further weaken its ideological and social role within local colonial communities. In a financial crisis of 1804, the crown attempted to call in debts owed the church, mainly in the form of mortgages for haciendas owned by the elites. The Act of Consolidation simultaneously threatened the wealth of the church, whose capital was mainly lent for mortgages, as well as threatening the financial well-being of elites, who depended on mortgages for acquiring and keeping their estates. Shortening the repayment period meant many elites were faced with bankruptcy.
=== Fried === Pisang goreng ("fried banana" in Indonesian and Malay) is a plantain snack deep-fried in coconut oil. Pisang goreng can be coated in batter flour or fried without batter. It is a snack food mostly found in Indonesia, Malaysia, Singapore and Brunei. Ethakka appam, pazham (banana) boli or pazham pori are terms used for fried plantain in the state of Kerala, India. The plantain is usually dipped in sweetened rice and white flour batter and then fried in coconut or vegetable oil, similar to pisang goreng. It is also known as bajji in Southern Indian states, where it is typically served as a savory fast food. Aritikaya kura, or vepudu are terms used for deep fried or cooked plantain dish in the state of Andhra Pradesh, India. Plantain is known as Raw Banana or Aritikaya in this part of southern India. It is usually served with steamed white rice and maybe accompanied with plain curd or yogurt. It is usually a favourite dish to be served in weddings and other occasions. In the Philippines, fried bananas are also served with arroz a la cubana and is frequently characterized as one of its defining ingredients. Plantains are used in the Ivory Coast dish aloco as the main ingredient. Fried plantains are covered in an onion-tomato sauce, often with a grilled fish between the plantains and sauce.
=== Domestic use === When a sanitary potable water supply is plumbed to an unsanitary system, for example lawn sprinklers, a dish washer or a washing machine, a check valve called a backflow preventer is used to prevent contaminated water from re-entering the domestic water supply. Some types of irrigation sprinklers and drip irrigation emitters have small check valves built into them to keep the lines from draining when the system is shut off. Check valves used in domestic heating systems to prevent vertical convection, especially in combination with solar thermal installations, also are called gravity brakes. Rainwater harvesting systems that are plumbed into the main water supply of a utility provider may be required to have one or more check valves fitted to prevent contamination of the primary supply by rainwater. Hydraulic jacks use ball check valves to build pressure on the lifting side of the jack. Check valves are commonly used in inflatables, such as toys, mattresses and boats. This allows the object to be inflated without continuous or uninterrupted air pressure.
The insulin-like growth factors (IGFs) are proteins with high sequence similarity to insulin. IGFs are part of a complex system that cells use to communicate with their physiologic environment. This complex system (often referred to as the IGF "axis") consists of two cell-surface receptors (IGF1R and IGF2R), two ligands (IGF-1 and IGF-2), a family of seven high-affinity IGF-binding proteins (IGFBP1 to IGFBP7), as well as associated IGFBP degrading enzymes, referred to collectively as proteases.
Sources: en.wikipedia.org
It binds to and activates PPAR delta, a nuclear receptor that controls expression of genes related to fatty acid oxidation. This mechanism can alter energy metabolism in animal models. It is not a direct stimulant or fat-burning enzyme.
Early-stage trials examined lipid and glucose markers, but the development program was discontinued. Published human results are limited and do not support approved use for any indication. Claims of performance or health benefits remain unproven.
Yes. Laboratories use LC-MS/MS to detect GW501516 and its metabolites in urine. Detection depends on timing and sensitivity, but the substance is banned at all times.
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.